Harshal Gavali

🎯 Ace Your Next React JS Interview with These Top Questions! Whether you're preparing for your first frontend dev role or aiming to land a senior position, mastering these questions will give you a serious edge. Here’s a quick breakdown of what you’ll learn👇 🔹 Beginner Level What is React.js? How is it different from other JS libraries? What are components, props, and state? How does JSX work in React? 🔹 Intermediate Level What is the Virtual DOM & how does React render efficiently? What are lifecycle methods? How does routing work with React Router? Controlled vs Uncontrolled components Event handling & form validation Hooks, Context API, lifting state up 🔹 Advanced Level Reconciliation algorithm (Fiber tree) Higher Order Components (HOCs) Performance optimization (lazy loading, memoization) Server-side rendering (SSR) Difference between Redux & React’s state 💡 Pro Tip: Practice these with real-world examples and you’ll not only crack interviews but also build scalable, production-grade apps. 🧠 Want the full curated PDF with answers? Comment “React Ready 💥” and I’ll DM it to you! 📕 Buy Micro-Frontend Book- https://amzn.to/4cwHIjC ❤️ Support for daily Insights - https://lnkd.in/gdjhysr5 👇 ❤️ Like if you're prepping 🔁 Repost for your dev circle 💾 Save this before your next interview #reactjs #reactinterview #frontendinterview #javascript #frontenddeveloper #reactquestions #reactpreparation #reactdeveloper #reacthooks #virtualdom #reconciliation #redux #webdevelopment #frontendmentor #reactrouter #webdevinterview #frontendlife #reactstate #contextapi #useeffect #reactmemo #reactoptimizations #lazyloading #hooksinreact #reactcomponent #codinginterview #devlife #softwareengineering #developercommunity #reactcareer #statevsprops #controlledcomponents #uncontrolledcomponents #usecontext #reactarchitecture #reactfiber #reactreconciliation #usememo #reactinterviewquestions #reacttips #reacttesting #jest #enzyme #performanceoptimization #reactssr #reactapp #reactforbeginners #reactadvanced #frontendmasters #reactlearning #reactreusability

🚀 Throttling in JavaScript​: Optimize Performance Like a Pro! Throttling is a powerful technique to control how often a function executes, ensuring optimal performance and smoother user experiences. Here's what you need to know: 🔹 What is Throttling? Throttling limits a function to execute at most once in a specified time interval, even if triggered multiple times. 🔹 Why Use Throttling? ✅ Prevents excessive function calls (e.g., rapid button clicks) ✅ Optimizes performance (reduces unnecessary computations) ✅ Improves UX (avoids lag during scroll/resize events) 🔹 How to Implement Throttling function throttle(func, delay) { let lastCall = 0; return function (...args) { const now = new Date().getTime(); if (now - lastCall >= delay) { lastCall = now; func.apply(this, args); } }; } 🔹 Use Cases Scroll Events: Log scroll position once per second. Button Clicks: Prevent spam clicks (e.g., submit buttons). Window Resize: Optimize layout recalculations. API Polling: Control request frequency. 🔹 Example: Throttling a Scroll Event function onScroll() { console.log("Scrolling...", new Date().toLocaleTimeString()); } window.addEventListener("scroll", throttle(onScroll, 1000)); 🔹 Throttling vs. Debounce FeatureThrottlingDebounceExecutionRegular intervalsAfter inactivityUse CaseScroll/resize eventsSearch inputs 💡 Pro Tip: Use throttling for frequent events (e.g., scrolling) and debounce for delayed execution (e.g., search bars). #JavaScript #WebDevelopment #Coding #FrontEnd #Throttling #Debounce #Performance #UX #Programming #Tech #Developer #100DaysOfCode #WebDev #JS #SoftwareEngineering #React #Angular #VueJS #NodeJS #CleanCode #CodingTips #LearnToCode #TechCommunity #DevCommunity #ProgrammingLife #CodeNewbie #JavaScriptTips #WebDesign #FrontEndDev #BackEnd #FullStack #ProgrammingTips #TechTips #ComputerScience #Debugging #WebPerformance #UserExperience #CodingIsFun #SoftwareDeveloper #CodeOptimization #ProgrammingLanguages #TechWorld #DeveloperLife #CodeEveryday #TechInnovation #ProgrammingMemes #CodingJourney #LinkedInTech

🚀 Popular JavaScript Stacks in 2025: Choose Your Tech Stack Wisely! The JavaScript ecosystem offers multiple stack options for building modern web applications. Here’s a breakdown of the most popular ones: 🔥 Full-Stack JavaScript Stacks 1️⃣ MERN Stack (Most Popular) MongoDB (NoSQL DB) Express.js (Backend Framework) React (Frontend Library) Node.js (Runtime) ✅ Best for: SPAs, CRUD apps, MVP development 2️⃣ MEAN Stack (Angular Alternative) MongoDB Express.js Angular (Frontend Framework) Node.js ✅ Best for: Enterprise apps, large-scale projects 3️⃣ MEVN Stack (Vue.js Lovers) MongoDB Express.js Vue.js (Progressive Framework) Node.js ✅ Best for: Lightweight, flexible UIs 4️⃣ PERN Stack (SQL Fans) PostgreSQL (Relational DB) Express.js React Node.js ✅ Best for: Data-heavy apps, structured data 5️⃣ JAMstack (Modern Web) JavaScript APIs Markup (Static Site Generators) ✅ Best for: SEO-friendly, high-performance sites 6️⃣ TStack (TypeScript Lovers) TypeScript tRPC (End-to-end typesafe APIs) Tailwind CSS ✅ Best for: Type-safe full-stack apps 7️⃣ PORN Stack (AI-Powered) (Yes, that’s the name!) PostgreSQL OpenAI (AI Integration) React Next.js ✅ Best for: AI-driven applications 💡 How to Choose? MERN/PERN: Best for general web apps. MEAN: Ideal for structured, large-scale projects. MEVN: Great for lightweight, reactive UIs. JAMstack: Perfect for blogs, marketing sites. TStack: TypeScript lovers’ dream. PORN: Next-gen AI apps. Which stack are you using or planning to learn? 🚀 #JavaScript #WebDevelopment #MERN #MEAN #MEVN #PERN #JAMstack #React #Angular #VueJS #NodeJS #TypeScript #NextJS #OpenAI #FullStack #Frontend #Backend #Programming #SoftwareEngineering #TechStacks #Developer #Coding #TechTrends #100DaysOfCode #DevCommunity #AI #MachineLearning #WebDev #CodeNewbie #ProgrammingLife